@Misc{ 
  monmor10,
  author = { Monti, Roberto and Morbidelli, Daniele },
  title = { Pseudohermitian invariants and classification of CR mappings in generalized ellipsoids },
  journal = {  },
  year = { 2010 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/52/ },
  note = { cvgmt preprint}
}